The Type 536 does not contain trigger and sweep circuitry.
To use a 536 as a conventional oscilloscope, a Type T timebase plug-in can be installed in the Horizontal bay.

The 536 contains identical vertical and horizontal amplifiers, with a front panel control to set the two in phase.
This allows an equal bandwidth of 11 MHz in both directions.
It also has a special CRT (T5360) with equal bandwidths in both directions.
Aside from the amplifiers, the only other circuitry in the entire scope are the power supplies and calibrator.